Function simdnoise::sse41::fbm_1d

pub unsafe fn fbm_1d(
    x: __m128, 
    freq: __m128, 
    lacunarity: __m128, 
    gain: __m128, 
    octaves: u8
) -> __m128

This is supported with target feature sse4.1 only.

Get a single value of 1d fractal brownian motion.